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On Site Guide intelligence

Pirform's intelligence incorporates the following guidance from the IET's On-Site Guide, specifically Table 7.1(ii). Read more here.

Ring Final Circuits

The following ring final circuits configurations are recognised by cable-sizing rules. ("CB" below refers to circuit-breaker.)

Rating Standard Live CPC Reference Method
30 3036 2.5 1.5 100, 102, A, C
30 3036 4 1.5 100, 102, A, 101, 103, C
32 CB (60898 B, C, & D)
RCBO (61009 B, C, & D)		 2.5 1.5 100, 102, A, C
32 88-2 2.5 1.5 100, 102, A, C
32 60269-2 2.5 1.5 100, 102, A, C
32 88-2 4 1.5 100, 101, 102, 103, A, C
32 60269-2 4 1.5 100, 101, 102, 103, A, C
32 88-3 2.5 1.5 100, 102, A, C
32 88-3 4 1.5 100, 101, 102, 103, A, C
32 CB (60898 B, C, & D)
RCBO (61009 B, C, & D)		 4 1.5 100, 101, 102, 103, A, C